A review of the week's news including a potential environmental disaster looming in Bay of Plenty, John Key shrugs off country's credit downgrade as National retains substantial lead in polls, Treasury rejects Auditor General's accusations it did not do enough to manage the deposit guarantee scheme, criminologist says plunging crime stats are not down to "get tough" measures on criminals, biggest reforms in criminal justice procedure in 50 years become law, more drownings so far this year than in past 14 years, Foreign Minister says "ominious" tone surrounds strengthened security for this year's Japanese whaling mission and All Blacks' rivals say a Rugby World Cup tournament without them would be empty.